Evidence map›Paper›PMID 41168154›Full record

ArticleNature communications2025

Counter-propagating entangled photon pairs from monolayer GaSe.

Zhuoyuan Lu, Jiri Janousek, Syed M Assad, Shuyao Qiu, Mayank Joshi, Yecheng Hu, Alex Y Song, Chuanyu Wang, Manuka Suriyage, Jie Zhao and 2 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Zhuoyuan Lu *School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia.
Jiri Janousek *School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia.
Syed M AssadARC Centre for Quantum Computation and Communication Technology, The Australian National University, Canberra, ACT, Australia.
Shuyao QiuSchool of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia.
Mayank JoshiARC Centre for Quantum Computation and Communication Technology, The Australian National University, Canberra, ACT, Australia.
Yecheng HuSchool of Electrical and Computer Engineering, The University of Sydney, Sydney, NSW, Australia.
Alex Y SongSchool of Electrical and Computer Engineering, The University of Sydney, Sydney, NSW, Australia.ORCID http://orcid.org/0000-0003-0307-2184
Chuanyu WangSchool of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia.
Manuka SuriyageSchool of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia.
Jie ZhaoARC Centre for Quantum Computation and Communication Technology, The Australian National University, Canberra, ACT, Australia.ORCID http://orcid.org/0000-0002-7382-1964
Ping Koy LamARC Centre for Quantum Computation and Communication Technology, The Australian National University, Canberra, ACT, Australia.ORCID http://orcid.org/0000-0002-4421-601X
Yuerui LuSchool of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT, Australia. yuerui.lu@anu.edu.au.ORCID http://orcid.org/0000-0001-6131-3906

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Non-phase-matched spontaneous parametric down-conversion (SPDC) in atomically thin materials provides new degrees of freedom and enhanced quantum information capacity compared to conventional phase-matched sources. These systems emerged as promising platforms for quantum computing, communication, and imaging, with the potential to support higher-order nonlinear processes. However, direct observation of photon-pair emission from a monolayer has remained experimentally challenging. In this work, we theoretically modeled SPDC emission across the full angular space from a monolayer GaSe film and experimentally validated the model through measurements of both co- and counter-propagating photon pairs. We demonstrated two-photon quantum correlations in the telecom C-band from a monolayer SPDC source. The spatially symmetric, broadband emission predicted by theory was confirmed experimentally. Furthermore, we observed high-fidelity Bell states in the counter-propagating configuration. Our results revealed the emission characteristics of SPDC in the deeply subwavelength, non-phase-matched regime, and introduced atomically thin, counter-propagating SPDC as a scalable and integrable platform for programmable quantum state generation, extendable via moiré superlattice engineering.

Identifiers

PMID41168154
PMCPMC12575680

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.